Microcontroller- Based Mechanically Scanned Led Flash Display

Mohamad Musa , Suntong (2008) Microcontroller- Based Mechanically Scanned Led Flash Display. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

The final year project title is "Microcontroller-Based Mechanically Scanned LED Flash Display". The objective of the project is to produce the dynamic LED flash display system controlled by 8 bits PIC microcontroller. This project involves designing of the speed motor controller hardware and software. The project is basically combination of the hardware including DC motor, mechanical part, microcontroller LED driver and other supporting devices. The software application is design based on assembly language. Aim of this project is to produce a battery operated dynamic LED display system that capable to display a short message using a single column of seven LED's. This project used the PIC 16F84A microcontroller as a main processor of the control system, where the seven LED's are controlled through 1/0 ports of the microcontroller. In order to produce a readable message, the speed of the DC motor rotation needs to be control and synchronized with the LED's flashing frequency. The separate power supply between ball bearing sliding contact and DC motor allow rotation speed to be change without effect voltage value on the circuit. The system also provides the button for the purpose of system initialization, clock setting and DC motor speed.

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